be made of和be made from有什么区别

　　1、be made of“由…构成”，能看出原材料，像桌子由木头制成，刀子由铁或金属制成，很明显看出原材料，如：
　　①The desk is made of wood.
　　②The knife is made of metal.

　　2、be made from“由…构成、制成成品”，被制成的东西看不出原材料，像纸是由木头制成的，这就看不出。
　　如：The paper is made from the wood.

　　3、be used for doing 用来做…
　　如：The knife is used for cutting things.
　　The pen is used for writing.

　　4、be used as 用来作…
　　The house is used as my bedroom.这个房子用作我的卧室。本回答被提问者和网友采纳

of从成品上能看出来原材料，from看不出来

原材料不同

看不见原材料，和看的见原材料